Plenum Boxes
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The Plenum box allows square grilles and diffusers to connect to circular duct. Each box size has a two diameter circular spigot for maximum versatility. The box is deep enough to accommodate both a double deflection grille and opposed blade damper.
Manufactured in flame retardant high impact recyclable thermoplastic.
DIMENSIONS:
Stock Ref. | A | B | CØ | DØ | E | F |
560601 | 200 | 130 | 125 | 150 | 25 | 25 |
560602 | 250 | 130 | 150 | 175 | 25 | 25 |
560603 | 300 | 130 | 200 | 225 | 25 | 25 |
560604 | 300 | 130 | 250 | 300 | 25 | 25 |
560605 | 450 | 130 | 315 | 400 | 25 | 25 |






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ESTIMATED RUNNING COSTS
Calculate estimated running costs for this product using the tool below.
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Where a product has multi speeds, a typical installation has been used for the below calculations.
Based on the inputted figures, estimated running costs would be:
Overview
The Plenum box allows square grilles and diffusers to connect to circular duct. Each box size has a two diameter circular spigot for maximum versatility. The box is deep enough to accommodate both a double deflection grille and opposed blade damper.
Manufactured in flame retardant high impact recyclable thermoplastic.
Technical
DIMENSIONS:
Stock Ref. | A | B | CØ | DØ | E | F |
560601 | 200 | 130 | 125 | 150 | 25 | 25 |
560602 | 250 | 130 | 150 | 175 | 25 | 25 |
560603 | 300 | 130 | 200 | 225 | 25 | 25 |
560604 | 300 | 130 | 250 | 300 | 25 | 25 |
560605 | 450 | 130 | 315 | 400 | 25 | 25 |

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